The Bar tender was busy,
because they were square.
Turns out there is a mathematicians holiday for yellow pigs.
The Yellow Pig is believed to have originated with mathematicians Michael Spivak and David C. Kelly, while they were students at Princeton University in the early 1960s. They began listing interesting properties of the number 17, and somehow the 17-eyelashed yellow pig was born. ~according to, Laura A. Haight in “Hamming It Up At Hampshire”
You can celebrate almost any 17th, but typically May, June, July and Sept. are the more popular months for college Math lovers.
Go be a pig, and get your math on!